Streetball is an urban form of basketball, played on playgrounds and in gymnasiums across the world. Usually only one side of the court is used, but otherwise the rules of the game are very similar to those of professional basketball. The number of participants in a game, or a run, may range from one defender and one attacker (known as one on one or mano-a-mano) to two full teams of five each.

Streetball is a very popular game worldwide, and some cities in the United States have organized streetball programs, such as midnight basketball, as a way for young people to keep out of trouble and avoid problems such as juvenile crime and drugs. Many cities even host their own weekend-long streetball tournaments. Hoop-It-Up and the Houston Rockets Blacktop Battle are two of the most popular. In recent years, streetball has seen an increase in notoriety and exposure in media due in part to television shows such as ESPN's "Streetball" and "City Slam", as well as traveling exhibitions such as the AND1 Mixtape Tour and Ball4Real.